extrait de sol

OBS: Les extraits de sol ou de terre ont des applications dans la culture des algues.

CONT: Cultures [of algae] are generally made initially in liquid media, which may be relatively simple inorganic media or may contain organic compounds (...). Many organisms require either a soil, peat or lake mud extract or a solution made up in sterilized lake- or sea-water. (...) The recognition that soil extracts stimulated growth led to the addition of 5 [cc] of a soil extract to Schreiber's medium (...) and with this medium, known as Erd-Schreiber, many more algae were cultured successfully.